Pulverizer and blower



(No Model.)

H. C. WITMER.

' PULVERIZER AND BLOWER. No. 561,744. Patented June 9, 1896. f

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HENRY C. W'ITMER., OF UNION HILL, NEV JERSEY.

PU LVERIZER AND BLOWER.

SPECIFICATION forming part of Letters Patent No. 561,744, dated June 9,1896. ppliitl'll filed September 26, 1895. Serial No. 563,707. (No modelTo @ZZ whom, t may concern.-

Be it known that I, HENRY C. VITMER, of Union Hill, Hudson county, NewJersey, have invented certain new and useful lmprovements in Pulverizersand Blowers, of which the following is a specification.

My invention relates to improvements in the class of pulverizers whichhave rotative blades 'or bats within a casing, which blades or bats arearranged to strike fuel or other material to pulverize it.

rlhc object of myinvention `is to cause large particles or pieces offuel or other material to be pulverized to be retarded from beingcarried around by the blades or bats and to be quickly broken into finerpieces; and to this end the invention consists in a casing havinginterior ribs provided with a series of notches or corrugations incombination with a rotative shaft and a series of blades or bats carriedby said shaft, whereby as the blades or bats are carried around thelarge particles or pieces of fuel or other material Within the casingwill. be caught between the blades or bats and the notches on the ribs,and said notches Will retard said large particles or pieces of fuel ormaterial from being carried around, and will also, in conjunction withthe blades or bats, cause said fuel or material to be broken into nnerparticles or pieces.

Reference is to be had to the accompanying drawings, forming parthereof, wherein- Figure l is a cross-section of a pulverizer embodyingmy improvements on the line l l in Fig. i), and Fig. 2 is a centrallongitudinal section of the pulverizcr.

ln the accompanying drawings, in which similar numerals of referenceindicate corresponding parts in the several views, l indicates a hollowcasing having heads 2 2 suitably connected thereto. The casing l is madein two er more sections to permit access to its interior. 3 is a shaftpassing longitudinally through the casing and journaled in. suitablebearings thereon1 and rotated by any desired means, such as pulley andbelt.

-lVithin the casing l. are aser-ies of annular ribs 5, which on theirinner faces are provided With a series of notches or corrugations 6, asshown. Any suitable number of these ribs 5 can be used, and the notches6 are placed at short distances apart-say one and one-half inches-thenotches G being quite shallowsay one-eighth of an inch deep.

7 are blades or bats Within the casing l, which blades are shown carriedby arms 8, suitably secured to the shaft 3, so as to be carried aroundwith said shaft. There are any suitable number of these arms S arrangedradially around the shaft in spider form, the blades or bats 7 beingarranged in series around the shaft. The outer edges of the blades 7 lieWithin the are described by the inner face of the ribs 5, so as toencounter material that may lie on said ribs. By preference the seriesof blades or bats are placed at gradually-increasing angles relativelyto the axis of the shaft,frorn one end of the casing l to the other end,or, in other Words, the first series of blades or bats 7 at the left inFig. 2 is placed parallel, or nearly so, to the axis of the shaft, andthe next series of blades is set at an angle to the axis of the shaft,the next series being at a greater angle, and so on throughout all theseries. By this means the fuel or other material to be pulverized thatenters the casing l through an inlet 9 is struck by the first series ofblades, and it is gradually fed forward through the casing by therotation of the blades, which, by their peculiar angular arrangementrelatively to the shaft, cause a current of air to develop Within thecasing, which travels toward the outlet l0, and the last series ofblades, or the ones near the outlet l0, cause the pulverized material tobe forced from the casing. lVhen comparatively large pie-ces of fuel orother material enter the casing, they Will be caught by the rotatingblades, and as such pieces fall on the ribs 5 the edges of the notches Gencounter the pieces and retard them from being carried around by theblades, and the blades and notches together act on such pieces ofmaterial to break them into smaller pieces, somewhat of a grindingaction taking place. The rotation of the blades also causes a linepulverization of the fuel or other material as it is tossed about withinthe casing, and this pulverization is also produced by the at trition ofthe particles of material one upon another.

11 is an inlet for air whereby the rotative blades will cause a freecirculation of air IOO through the casing, these blades that pulverizethe fuel also acting to mix the fuel or material With the air and toforce said mixture of fuel and air out through the outlet l0.

My improved pulverizer is particularly adapted for use for supplying amixture of pulverized fuel and air to the combustionchamber of afurnace, as it will properly pul- Verze the fuel, mix it with air, andforce the proper quantity of the mixture of air and fuel to the furnace.The notched or corrugated ribs assure that large particles or pieces offuel will not be delivered from the casing; but of course the pulverizercan be used to pulverize other suitable materials.

It is evident that the blades or bats 7 can be suitably arranged asregards size, quantity, and position. For instance, one series of bladescan be carried on long arms 8, and another series on shorter arms, as indotted lines in Fig. 2, to strike the fuel that may drop toward theshaft, and also to create a cross rotary air-current within the casingto retard the iow of pulverized material from the casing.

Having now described my invention, what I claim isl. In a pulverizer, acasing having interior annular ribs which project from the inner Workingsurface of the casing, the inner surfaces of which ribs are notched orcorrugated, in combination with a rotative shaft Within said casing andseries of blades or bats carried by said shaft, the outer edges of saidblades or bats lying Within a circle described by the inner faces ofsaid ribs, substantially as described.

2. In a pulverizier, a casing having interior annular ribs the innersurfaces of which are notched or corrugated, in combination With arotative shaft Within said casing and series of blades or bats carriedby said shaft and placed at graduallyeincreasing angles rela tively tothe shaft and arranged to coact with the notched ribs to break pieces ofmaterial to be pulverized.

HENRY C. XVITMER. lVitnesses:

WM. M. RUSSELL, T. F. BOURNE.

